package com.psjj.privilege.web.filter;


import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class UserLoginFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest req=(HttpServletRequest) servletRequest;
        HttpServletResponse resp=(HttpServletResponse) servletResponse;
        Object user = req.getSession().getAttribute("user");
        String method = req.getParameter("method");
        if(user!=null || "login".equals(method)){
            filterChain.doFilter(req,resp);

        }else {
            resp.sendRedirect(req.getContextPath()+"/login.jsp");
        }


    }

    @Override
    public void destroy() {

    }
}
